You can still apply for Beta, and may be selected for earlier phases, however those meeting the following prerequisets will get favorability.
There are 4 paheses of Beta, each with different levels of eligability:

Heroes of Eorzea─your time has come! Phase 1 of the FINAL FANTASY XIV: A Realm Reborn Beta Test is scheduled to begin on February 25. We will begin sending notification e-mails to players accepted as beta testers in the near future, so keep an eye out for your summons._________________I've come here to chew bubblegum and kick ass, and i'm all out of bubble gum! ~ Roddy Pipper

Schedule is up and so is the list of servers, using the M method should we roll on Moogle?_________________
A new life awaits you in the Off-world colonies! A chance to begin again in a golden land of opportunity and adventure!
- Blade Runner